Thomas k



(No-Model.)

T. K. KEITH 8E R. ARLETN.

EEED MEGHANISM EOE SEWING MACHINES.

No.268,804. Patente 'i I. H

E14/@'06 Mdm UNITED STATES vPATENT OFFICE.

.THOMAS K. KEITH AND ROSWELL UARLETON, F HAVIIRHILII,` MASS.

FEED MECHANISM FOR SEWING-MACHINES.

j SPECIFICATION forming part of vLetters ,Patent No. 268,804, datedDecember 12, 1882.

Application niednprnemsee. (Naumann.) l

To all whom it may concern Beit known that we, THOMAS K. KEITH andRoswELL CAELETON, both of Haverhill, in the improved feed mechanism fora sewing -machine, whereby any desired series of horizontal movementscan be given to the work, so as to cause the stitch-forming mechanism toautomatically arrange the stitches in any desired pattern-or design.

To these ends our invention consists in the employment of pattern-cams,rotated, step by step, by the power of the machine, and a work holdingand feeding device capable ot' a horizontal movement in' any directionon the bed of the machine, and operated by said patterncams to give thework the ,desired series of movements.

The invention also consists in the provision of means for automaticallyraising the presserfoot while the work is being fed, and allowing it tohold the work when the stitches are being formed.

The invention also consists in certain details ot' construction, all ofwhich we will now proceed to describeand claim.

Ot' the accompanying drawings, forming a part of thisspecitication,`Figure l represents aside elevation of a machineembodying our invention. Fig. 2 represents a top view of the same with aportion of the arm broken away. Fig. 3 represents an end view of the armof the machine with the face-plate removed. Fig. 4 represents a sectionon line a: w, Fig. 1. Fig. 5 represents a design formed in stitches bythe machine.

The same letters of reference indicate the same parts in al1 the gures.

In the drawings, A represents the bed of a sewing-machine. B representsthe arm; G, the needle; D, the presserfoot,and E the shuttle, said partsoperating inthe usual manner.

In the bed A are transverse dovetail grooves E E, extending from frontto back, and in these grooves are fitted slides F F, which are adaptedto reciprocate in said grooves. The slides F F are connected lat theirends by plates G G,

which are under the presser foot and needle,

so that the plates do not obstruct the operation Y Voi" thestitch-forming mechanism.

K represents a studjournaled in the rear portion of the arm of themachine, and provided. with aratchet, L, which is rotated, step by step,by apawl, M, operated by a rod, N, bell-crank lever O, and arm l?, andan eccentric, Q, on the driving-shaft R of the machine. On the stud K isplaced a pair of pattern cams or plates, S T, whichare connected by apin, U, with the ratchet L, so as to rotate therewith. The plate S has acamgroove, a, and the plate T a cam; groove, b.

c d represent levers pivoted to a stud, c, on the arm of the machine.The lever c is provided with a pin or roller, c', which enters thecamgroove a', and the lever d is provided with a pin, d2, which entersthe cam-groove b. The levers are thus caused to be oscillated by therotary movements of the plates T S. The lower end of the lever c isconnected with a bell crank lever, h, which is pivoted at t' to the bedof the machine, and is connected by a link, j, with one of the guides G.The lever dis connected by a rod, d', with the plate I.

It will be seen from the foregoing that the oscillations ot' the lever cwill impart through thelever h and link j a reciprocating movement tothe slides F F, guides G G, and plate I, carrying said parts toward andfrom the front of tliemachine. At the same time the oscillations of thelever d impart through the rod d a reciprocatin g movement to the plateI in a direction at right angles to the line of movement IOS . ings areadapted to move the work so as to form l needle-bar descends the pin preleases the lever he leaf-shaped design shown in Fig. 5; but it isobvious that a different design can be produced by differently shapedcams, so that by providing a number of pairs or sets of' cams, eachvdiffering from the others, a corresponding number of different designsmay be produced.

The plates S T are adapted to be readily applied to and removed from thestud K. We prefer to secure the plates to the stud by means of aspring-hook,m, placed in a slot in the stud, and having a beveled outerend, which yields when the plates aremoved onto the stud, and springsout and prevents the withdrawal of the plates when they are in place.

The presser-bar D is provided with a pvoted lever, n, the lower end otwhich bears on the lower end of the easing on the end of the arm B,andits other end projects upwardly toward the needle-bar C. The needle-barhas a pin, p, which, when said bar rises, strikes the lever ot andturnsit on its pivot so as to cause it to raise the presser-bar. Thefoot is thus raised slightly with the needle, so that it will not impedethe movements-ot' the work. When the n and the presser-bar drops.

We claiml. In combination with the stitch -forming mechanism of asewing-machine, a work-holding plate, means, substantially as described,whereby said plate is enabled to move horizontally in any direction onthe bed of the machine, pattern-cams rotated by the power of themachine, and intermediate devices whereby said cams are caused tooperate the work -holding plate, as set forth.

2. The combination of the bed having guidegrooves E, slides F, adaptedto move in said grooves, and supporting-guides G, a work-holding plate,I, adapted to slide in the guides G, the pattern-cams01y b, andintermediate connecting devices, all arranged and operated as set forth.l

3. The combination ofthe arm B, the presser bar having the pivoted levern, and the needlelVitnesses C. F. BROWN, A. L. WHITE.

